The circular scale of a screw gauge has 50 divisions and pitch of $0.5 mm$ . If the diameter of sphere is D,write the value of 5D. Main scale reading is 2 .

Question

The circular scale of a screw gauge has 50 divisions and pitch of 0.5 mm . If the diameter of sphere is D,write the value of 5D. Main scale reading is 2 .

TestHub · Accepted Answer

Least count LC = Number of divisions on circular scale Pitch ​ = 50 0.1 ​ = 0.01 mm Now, diameter of ball = ( 2 × 0.5 mm ) + ( 25 − 5 ) ( 0.01 ) = 1.2 mm

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JEE Advanced (2028)